Config gone post 1.9

[Eiji]

If you know that something have changed since x release then it’s worth to check it’s announcement.

Here are official sources:

@Elixir

Another important change related to configuration is that mix new will no longer generate a config/config.exs file. Relying on configuration is undesired for most libraries and the generated config files pushed library authors in the wrong direction. Furthermore, mix new --umbrella will no longer generate a configuration for each child app, instead all configuration should be declared in the umbrella root. That’s how it has always behaved, we are now making it explicit.

Elixir v1.9 released

Release v1.9.0 · elixir-lang/elixir